19678982419 has 2 divisors, whose sum is σ = 19678982420. Its totient is φ = 19678982418.

The previous prime is 19678982399. The next prime is 19678982447. The reversal of 19678982419 is 91428987691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19678982419 - 2¹⁵ = 19678949651 is a prime.

It is a super-2 number, since 2×19678982419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19678986419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9839491209 + 9839491210.

It is an arithmetic number, because the mean of its divisors is an integer number (9839491210).

Almost surely, 2^19678982419 is an apocalyptic number.

19678982419 is a deficient number, since it is larger than the sum of its proper divisors (1).

19678982419 is an equidigital number, since it uses as much as digits as its factorization.

19678982419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 64.

The spelling of 19678982419 in words is "nineteen billion, six hundred seventy-eight million, nine hundred eighty-two thousand, four hundred nineteen".